Triterpenoid saponins from Atriplex semibaccata

Abstract

Four new triterpenoid saponins, 3-O-{[β-D-glucopyranosyl-(1→2)]-β-D-galactopyranosyl} -11α-methoxy-23-hydroxylongispinogenin, 3-O-{[β-D-glucopyranosyl-(1→2)]-β-D-galactopyranosyl} -11α-methoxy-23,29-dihydroxylongispinogenin, 3-O-{[β-D-glucopyranosyl-(1→2)]-β-D-galactopyranosyl} -29-hydroxysaikogenin F and 3-O-{[β-D-glucopyranosyl-(1→2)]-β-D-galactopyranosyl}-saikogenin F, have been isolated from Atriplex semibaccata. The structures were determined primarily by NMR spectroscopy. The assignment of NMR signals was performed by means of 1H-1H COSY, ROESY, HMQC and HMBC experiments.